996-08-7Relevant academic research and scientific papers
Bromodestannylation reactions of some functionally substituted organotin compounds
Chopa, A. B.,Koll, L. C.,Podesta, J. C.,Mitchell, T. N.
, p. 283 - 296 (2007/10/02)
Bromodestannylation reactions are reported for several functional substituted organotin compounds in carbon tetrachloride and acetonitrile as solvents.The reactions in carbon tetrachloride proceed with a high degree of retention of configuration at the carbon involved in the electrophilic substitution, while in a polar solvent there is an increase in the amount of inversion product formed.The electrophilic cleavage in the β-trialkylstannyl esters takes place with a complete reversal of the normal sequence of Sn-C bond cleavage by halogens; this is explained by tin assistance.The configuration of some 3-trialkylstannylpropanenitriles, β-bromonitriles and β-bromoesters are assigned.Full, 1H, 13C and 119Sn NMR data are given.
A highly selective synthesis of R2SnX2 (R = alkyl, X = Br, Cl) species directly from tin and alkyl halides
Ugo, R.,Chiesa, A.,Fusi, A.
, p. 25 - 30 (2007/10/02)
The reaction : Sn + 2RX -> SnR2X2 (X = Cl, Br) occurs at relatively low temperature (80 - 120 degC) and with selectives as high as 95 - 99percent in the presence of catalytic system fored by a crown ether and potassium iodide.The reaction is favoured by aprotic dipolar solvents such as dimethylformamide; the presence of an alkyl iodide as cocatalyst has a positive effect, the selectivity remaining unchanged.
Production of organotin halides
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, (2008/06/13)
A process is disclosed for the direct production of organotin halides, particularly triorganotin halides by the reaction of elemental tin and an organotin halide in the presence of a reagent amount of an `onium compound of the general formula Cat+ X-. Cat+ X- may represent a quaternary ammonium or phosphonium group or a ternary sulphonium group, or may also represent a complex of an alkali metal or alkaline earth metal with a polyoxygen compound. High yields of triorganotin halide product are obtained in contrast to results of reactions wherein Cat+ X- is present in only catalytic amounts.
Group 4 Organometallic Compounds. Part 8. Preparation and Moessbauer Spectra of Five- and Six-co-ordinate Di- and Tri-organotin Compounds containing Mixed Phenyl and Butyl Groups on Tin
Das, V. G. Kumar,Weng, Ng Seik,Smith, Peter J.,Hill, Robin
, p. 552 - 558 (2007/10/02)
Moessbauer spectroscopic data and preparative details are reported for a range of IVBuPh>, IVBu2Ph>, and IVBuPh2> compounds.The stereochemical preferences of the butyl and phenyl groups in octahedral and trigonal-
